He was 84.
The Hollywood Reporter confirmed his Wednesday death appeared natural, but no specific cause of death has been disclosed.
The famed British hairstylist rose to prominence in 1960s London where he made the "wedge" the must-have haircut.
The Vidal Sassoon brand is estimated to be worth about $150 million, the entertainment industry trade newspaper said.
Celebrity Families of 2014 [PHOTOS]